METHOD OF DETERMINING ROLL ANGLE OF STRAPDOWN INERTIAL NAVIGATION SYSTEM OF ROLL ARTILLERY PROJECTILE Russian patent published in 2016 - IPC F42B15/01 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to methods of determining roll angle of strapdown inertial navigation system of roll artillery projectile. In order to determine roll angle, method comprises measuring angular velocities of a projectile in coordinate system associated with projectile rotating on roll, demodulating angular velocities, perpendicular to longitudinal projectile axis, angle of roll with correction. Correction is defined as preliminary and subsequent adjusted value. Preliminary value is determined by phase between mean values of smoothed integrals of demodulated angular velocities. Subsequent value is determined by integral of angular velocity of rotation of projectile on yaw with a certain ratio.

EFFECT: providing increased accuracy in determining angle of roll, pitch and yaw of projectile.

2 cl, 10 dwg